class_docstr: A node in an OverlayGraph. Corresponds to a TensorFlow Tensor.
    
code: def __repr__(self):
      return "<%s: %s>" % (self.name, self.op)
  
imports: from collections import defaultdict
  import numpy
  import tensorflow
label_desc: Use image node_id 3 for calling the OverlayNode obj's underlying member method code with example usage: obj.__repr__() and returns: unknown